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Species Profile
Delta Smelt
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Species Details
Common Name | Delta Smelt |
Scientific Name | Hypomesus Transpacificus |
Federal Listing Status | Threatened |
Federal Regulating Agency | U.S. Fish and Wildlife Service |
State Listing Status | Threatened (CA) |
State Regulating Agency | California Department of Fish and Game |
IUCN Red List Status | Endangered B1+2cd) (1996) |
Banks
- Kimball Island Mitigation Bank |
- Liberty Island Conservation Bank |
Species Range

Delta smelt are found only in the Sacramento-San Joaquin Estuary, where the Sacramento and San Joaquin Rivers flow into San Francisco Bay. They have been found as far upstream as the mouth of the American River on the Sacramento River and Mossdale on the San Joaquin River. They extend downstream as far as San Pablo Bay. Delta smelt are found in brackish water. During the late winter to early summer, delta smelt migrate to freshwater to spawn.
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